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Mazzer SJ collar threads - stuck / what to lubricate

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  • #16
    Originally posted by Vinitasse View Post
    . And there certainly ain't no rocks in the sheets of paper that dull my scissors either. I think I know where the rocks are.
    while I dont want to get involved engineering discussions on the hardness of coffee beans versus various machine parts. lots of paper is coated with clay and various other minerals so while it may not be obvious there certainly are rocks on paper.

    is this thread helping anybody with coffee related issues?

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    • #17
      Originally posted by Vinitasse View Post
      After all, how do you explain worn burrs???? Coffee will dull that super hard steel in the same way that mere paper can and will dull scissors.
      paper doesn't dull good scissors; good scissors dull because they're adjusted so that the metal cuts against metal.

      the reason that burrs wear is the same reason that soft plastic chopping boards will dull sharp good quality knives - because it's not from scratching, it's from a folding-over of a very finely honed point. ceramic knives don't show this and I wouldn't imagine ceramic burrs would dull in the same way.

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      • #18
        Originally posted by Hildy View Post
        paper doesn't dull good scissors; good scissors dull because they're adjusted so that the metal cuts against metal.

        the reason that burrs wear is the same reason that soft plastic chopping boards will dull sharp good quality knives - because it's not from scratching, it's from a folding-over of a very finely honed point. ceramic knives don't show this and I wouldn't imagine ceramic burrs would dull in the same way.
        Dude, where do you get this stuff? Good scissors dull because the metal cuts against metal? Really?

        And yes, paper will (as far as I'm aware) accelerate blade wear due to abrasive compounds used to process it (what don said).

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        • #19
          I think what Hildy is suggesting is that if you use scissors to cut 'nothing' (i.e. open and close them repeatedly) that each blade will wear down the other. This of course, doesn't imply that paper will not also wear down the blades. I can't help but think of a sketch on the Late Show along the lines of "Not the Good Scissors!".......

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          • #20
            just noticed this thread, I recently cleaned the burrs on my SJ and could not get it to seat properly even though I thought the threads were clean and free of any residue. I took it to Dimattina in Osborne Park where I purchased it and the techies soon sorted me out, using a small wire brush and a quick clean of the threads and we were back in action.

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            • #21
              Originally posted by Hildy View Post
              the reason that burrs wear is the same reason that soft plastic chopping boards will dull sharp good quality knives - because it's not from scratching, it's from a folding-over of a very finely honed point. ceramic knives don't show this and I wouldn't imagine ceramic burrs would dull in the same way.
              Ceramic burrs wear the same way as metal burrs do - the sharp machined tips of the burrs are worn away and flattened, which is why worn metal burrs are visible from the shiny polished edges (new burrs aren't shiny at the edges as there is no 'surface' on the points to reflect light. Ceramic burrs wear the same way but just take a lot longer, unless you are unlucky to get a stone or bolt in them, which can make them shatter - not nice, since they tend to cost a lot more.

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              • #22
                Having owned Supper Jolly and Major for many years I always put some Dow111 on the threads before installing.The threads of Mazzer are very very tight.Without grease it's almost impossible to get smoot action from the adjustment system.
                Quamar(Fio) on the contrary has lots of play between the threads and I always installed that without any lubricant.
                But Mazzers...always some dow on there.And take care to turn it in carefully No force .The first couple of windings must turn very lightly.Don't destroy the threads!

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